Heater



June 21, 1932.

K K. WRIGHT 1,863,781

HEATER Filed- June 10, 1931 2 Sheets-Sheet 1 541 w 477 1% WWW? M M PAM June 21, 1932. K, K. WRIGHT 1,863,781

HEATER Filed June 10, 1951 2 Sheets-Sheet 2 ooooo' ooooo' Patented June 21, 1932 ant P g i l KIRK K. 'warerrr, or KENMORE, NEW YORK, ASSIGNOR T0 a. e. VIRIGHT & COMPANY, Q 7

I or BUFFALO, NEW Yon]; r v r HEATER Application filed June 10,

This invention relates to heaters ot' the kind in which a fluid is used for heating a milk, it isvery necessary that no portions of the liquid be heated above a certain'maximum temperature which is but slightly above the pasteurizing temperature. Under these circumstances, in order to have a pasteurizing apparatus operate eiiiciently and quickly in elevating the temperature of the liquid'to be pasteurized, it is desirable to have all portions of the pasteurizing fluid as near to the maximum temperature as is possible. While this invention is illustrated in the accompanying drawings as applied to a pasteurizer, it will be understood'that the invention is applicable toother types of heaters and is not restricted to pasteurizers. v i

he objects of this invention are to pro-' vide in a heater of this kind, heating and circulating means which operate to maintain the heating fluid at approximately the maximum temperature in all portions of the space in which the heating fluid is contained; also to provide a heater with a circulating system of this kind in which a'heated fluid is introduced into the body of heating fluid at the upper and lower portions thereof; also to provide a heater with a circulating system in which heating fluid is withdrawn from the heater at a portion intermediate the upper and lower parts thereof; also to provide a heater in which a portion of the heating fluid is removed from the heater tank for-applying heat thereto and another portion of the fluid is heated within the tank; also to im prove the construction of circulating and heating means in other respects hereinafter specified.

In the accompanying drawings:

Fig. l is an end elevation of a heater or pasteurizer having applied thereto fluid heating and circulating means embodying this invention;

thereof Fig. 2 is a transverse sectional'elevation 1931. Serial No. 543,332.

thereof,approximately on line 33, Fig. 2,

Fig.4 is a perspective view of a portion of a heater tank showing means for introducing heating fluid into the same; r

5 is a fragmentary sectional plan view thereof, on line 5 5, Fig. 3;

Fig. 6 is a fragmentary sectional elevation thereof, on line 6- 6, Fig. 1. Y

A represents a container for the liquid to be heated or pasteurized, which container may be of any suitable shape or form, that shown in the accompanying drawings being in the form of a. vat, into which a quantity. of material or liquidto be heated or pasteurizedis introduced and in which theliquid remains. until completion of the. heating or pasteurization. B represents thetank into which the vat or container A; extends, the tank being suific'iently larger than the vat A to leave a space around the vat inwhich the heating fluid maybe circulated to impart its heat to theliquid to be heated through the walls of the container A." The tank B may also be of any suitable or desired shape, that shown having inclined walls or partitions b'near the lower portion thereof which restrict the amount of heating fluid in the tank. 7

In accordance with my improved fluid heating and circulating system, I provide means for supplying heated fluid to both Jthc'upper and lowerportions of the tank and withdrawing fluid from the intermediate por tion of the tank; Since the heating fluid in the two opposite side portions of the tank is separated by the vat A, I preferably provide heating and circulating means for each side of the tank. In the particular construction shown in the accompanying drawings, I withdraw fluid from the tank through pipes or ducts l0 and impart heat to the same by adding heated fluid through jets 11 within housings 12, connecting with the pipes 10. The resulting mixture of heated fluid and the fluid withdrawn from the tank- B is conducted through pipes or passages 13 to distributing ducts 14 at the upperporas V principle.

be conducted to the heater througha pipe 16 from any suitable source of supply and this pipe is connected with two branch pipes 17 extending toward oppositesides of the,

tank and terminating in the injector nozzles 11 in the housings 12. Any other-way of conducting heating fluid to the injector nozzles may, of course, be employed, if desired. The distributing duct 14 may also be of any suitable or desired construction. I have found, however, that very good results can be obtained by making this distributing duct in the form of achannel, which maybe formed of sheet metal, and having the free edges of its legs welded or otherwise secured to the inner surface of the walls of the tank B. The

" channel or duct has apertures or discharge openings 18 through which the'heated fluid may be discharged into thespace between the vat A and tank B, and these holes or openings are preferably drilled or punched in the channels 14 in such a direction as to cause jets of fluid to be discharged through the apertures in a direction toward the vat ,wall,-so that the incoming heated fluid Wlll brush'a ainst the'vat wa'llsjto roduce a.

scrubbing effect which improves the transmission of heat fromthe fluldto the vat. One

end of each of thedistributor ducts 14 may communicate with the pipe13throughtlie medium of a header orchamber 19 from which the heated fluid passes to the d1str1buting duct 1.4, see particularly Figs. 4 and ,5. The'other end'of each duct is preferably --open or spaced slightly from the end wall of the tank, sothat any fluid not discharged through the apertures 18, will be discharged Y from the end of the duct and will be deflected laterally by the end wall of the tank, to.

cause th is'fluid to circulate in thespace between the adjacent ends of the tank and vat. The, channel shaped distributor ducts also .serve the purpose of reinforcing-the portions of the tank walls adjacent'thereto.

The portion of the heating and distributing system thus far described takes care of supply-ing'heating fluid to the upper portions of the tank at opposite sides thereof and for withdrawing'the somewhat cooler .fluid front the intermediate portions of the sides of the tank. Y By means of the injector action, a rapid flow of fluid is'induced through the housing 12 and pipes and ducts connected therewith, so that a thorough mixing of fluid inethe tank with the incoming hotter fluidresults.

The heating fluid in thelower part of heater 12.1 v V Theadvantages of the-circulating system described are that substantially all parts of the heating fluid in the tank B will bema'in tank is preferably'heated and circulated by means independent of the circulating system for the upper parts of the tank, and in the construction shown for this purpose, fluid heaters are arranged within the tank near the bottom thereof. These heaters may be of any .-suitable. or desired kind, each of those shown being in the form of a mixing device or housing 27, which isshown more in detail in Fig. 6,and whichreceivesadditional heating fluid, such, for example, as steam, from pipes or ducts 28 connecting with the pipes 17 and extending into the lower portions of the tank. Each heaterincludesa discharge nozzle 30 communicating with the pipe 28 for discharging heated fluid toward the inlet end ofadistri-buting pipe 2 1; The mixing device or housing 27 has apertures 82 through which fluid from the lower portion of the tank may enter, this flow of vfluid being induced by an ejector action of the nozzle 30. In case where'water is used as a heating liquid, steam maybe passed through thefnozzle 80, thus effecting a heating'of the water and inducing a rapid flow of the water through the heater.

InrIorder to effect aimiform distribution of the heated fluid to all parts of the tank,

each heater is arranged to discharge; the heated fluid to one end of a distributor pipe or duct'2 l, arranged at or near the bottom of the tank. This pipe has discharge a-per tures' 25'ai ranged to eftect'th'e desired distribution of heated fluid to difl'erentparts off the'tank'fT-he other end ofthe distributor pipe preferably --terminates at asl'ight dis tance fromthe adj acentend wall of'thetank to cause fluid'dischar-ged from this end to be deflected into the-space between the end walls of the {tank and -vat," as described in connection with the distributor duct 14. These ducts 24 maybe suitably secured to the tank 'in any [desired manner, for example, by

means of straps26 or the like.

Theapertures 25a-re arranged mainly to direct streams of heated fluid upwardly along thewa'lls of the vat or container A. Consequently, any heating fluid which has become cooled, and consequently settles towardthe bottom of-thetank will be drawn 1 into the apertures '32 of either of the'heaters or mixing device '27. and ''will be" reheated and directed into contact with the container A for theliquid to be heated. "Some of this liquid on contacting with the walls of the vat A, will 'become'cooled and will then be drawn into the discharge pipes 10 and may" be recirculated by meansof the injector or tained in active circulation sosthat only very slightdifierences in temperature willexist in di flierentportions of the tank'. Consequently,

sired.

heat will be conducted to a substantially similar extent through all portions of the vat or container A to the liquid to be heated. This increases the et'iciency of the heater by reducing the length of time required to heat the liquid in the container A to the desired temperature, without exposing any portions of this liquid to temperatures greater than those to which this liquid can be subjected without eflecting changesin the liquid. The construction described results also in a circulation of liquid lengthwise of the tank, since all of the injector nozzles draw liquid from one end of the tank and discharge the heated liquid toward the other end of the tank. By arranging the injector 12 outside of the tank and near the level of the pipe 10, the circulation of fluid through the distributor duct 14 is assured, even if the level of fluid in the tank should drop below that of the duct 14, but a heating device similar to the device 27 may be employed within the tank and connected with the duct 14, if de- The inlet openings 32 of the heater 27 are positioned near the space between the two adjacent end walls of the'tank and vat, so that liquid from this space will be drawn downwardly into these inlets, thus providing for circulation of pasteurizing fluid in this space. I

I claim as my invention:

1. A fluid heating and circulating system for heaters, including a container for the liquid to be heated and a tank into which said container extends and which forms with said container a space for the circulation of heating fluid, means for heating the fluid at the upper and lower portions of said space,

and for withdrawing fluid from a portion oi said space and for introducing" the same into another portion of said space to provide for circulation offluid in said liquid to be heated and a tank into which said container extends and which forms with said container a. space for the circulation of a heating fluid, said space being maintained. substantially filled with heating fluid, means for withdrawing fluid from a portion of said space and introducing the same into the upper portion of said space, and forheating the fluid withdrawn from said space before tank, through distributing ducts extending said tank. a

4. A heater, including a tank for the heat-' ing fluid, a container for the liquid to be heated extending into said tank, a combined fluid circulating and heating system including means for withdrawing fluid from a portion ofsaidtank below the upper portion thereof, and for supplying heated fluid to the upper and lower portions of said tank.

5. A heater, including a tank for the heating fluid, a container for the material to be heated extending into said tank, a combined fluid circulating and heating system including means for withdrawing fluid from a portion of said tank below the water leveltherein and returning the same to the upper portion-of said tank, for heating said flui d'during the circulation thereof, and for injecting heated fluid into the lower portion of said tank to induce a flow of fluid in said lower portion.

'6. A heater, including a tank for water nozzles arranged to supplyheat tothe water into the upper and -lower]portions of said tank. v

7. A heater, including a tank for water and a container for the materialto be heated 1 extending into said tank, steam injector nozzles arranged tosupplyheat to the water in ,said tank and to discharge the heated fluid into theupper and lower portions ot'said;

lengthwise of said tankin the upper and lower portions ,thereof and provided with means for distributing the heated water to diflerent portions of the tank lengthwise thereof.

8. A heater, including a tank for heating fluid, a vat for the material to be heated eX- tending into said tank and forming with said tank a space for the circulation of heat ing fluid, distributor ducts arranged at op posite sides of said tank and in the upper and lower portions thereof and provided with apertures for dischargingheated fluid at intervals into saidspace, and means for with. A

drawing fluid from a portion of said tank between the upper and lower portions thereof and for heating said fluid and discharging the same into a distributor duct.

9. A pasteuriz er, including'a tank for pasteurizing fluid, a vat for the liquid to be; r pasteurizedextending into said tank and forming with said tank a space for the circulatlon of pasteurizing fluid, distributor ducts arranged at opposite sides of said tank and 1n the upper and lower portions thereof and provided with apertures for, dischargmg heated fluid at intervals into said space,

. and means for admitting heated fluid into one end of each of said ducts, the other-ends of said ducts terminating at'a short distance from an end wall of said tank, to'cfause' said 1 I endwall todeflect fluid discharged from the ends of'said ducts into atransverse spaeefbetween the end walls of said vat and tank.

10. A pasteurizer, including a tank for pasteurizing fluid, a vat for the liquidto be pasteurized extending into said tank and forming with said tank a space for the circulation of pasteurizing fluid, distributor ducts arranged at opposite sides of said tank and in the upper and lower portions thereof and provided with apertures for discharging heated fluid at intervals into said space, and an injector nozz'lediseharging heated fluid into fluid from said tank and discharging the mixed fluids into said distributor .portionsofsaid tank.

wea er discharging the heated water into the upper 15." A heater including atank, avat for the material to-be heated extending into said tankrf'or formingwith said tank a space for containing a quantity of Water, distributor ducts'in the upper portion of said tank below the water level therein and adapted-t0 dis charge hot water into-the'body of Water in said portion, and means for Withdrawing water from said tankbelow the upper portion thereof, heating the Water and discharging the same into said distributor ducts.v

KIRK; s WRIGHT.

ducts to introducethe same into said tank and to produce circulation in said space. 11. A heater, including a tank for heating fluid'and a container for material to be heated extending into said tank, means for adding heat to the heating fluid and Circulating the same in said tank," including a distributor duct in saidtank which is ofchannel shape, and which has discharge orifices at intervals lengthwisethereof, and which has the free edgesof the flanges thereof secured to a tank 4 1 wall for reinforcing said tank walland for distributing heated fluid.

12. A heater, including a tank for heating fluid, a vat for thematerial to be heated ex- A tending into said'tank andiforming with said tank a space for thecirculation of heating fiui'd, clistributor ducts arranged at opposite '7 sides'of said tank and'i'n the upper and lowerportions thereof and provided with apertures for discharging heated fluid at intervals into f saidspace, and means for withdrawing fluld i. chargingthe same into said distributorduets.

fromone end of said tank at a portion thereof below the water level in the tank, and for heating the fluid thus withdrawn and dis- 13. A heater including a tank, a vat for the material to be heated extending into said tank for forming with said tank a space for the circulation of water, distributor ducts arranged at opposite sides of the tank in the dowel portions thereof and provided with apertures for discharging Water at intervalsv into said space, means for admitting steam into said distributor ducts to heat water in a said ducts andproduce circulation of water a in said space, distributor ducts at opposite sides of said tankin the upper portions thereof, and meansfor withdrawing water from said tank, heating said Water and discharging i the same into said distributor ducts, I V

7 -14. A'heaterincluding a'tank, a vat for: 1

the material to be heated extending into said' tank for forming with said tank a space for p the circulation of water, means for admitting steam directly into the lower portion of said 7 tank to heat the'water and produce circulation thereof, and means 'for Withdrawing;

wa er fr m a d a k; he ting he sam a 

